Injections. Close Up Of A Doctor Making A Vaccination In The Shoulder Of Patient, Flu Vaccination Injection On Athe act of putting a liquid, especially a drug, into a person’s body using a needle and a syringe (= small tube): Daily insulin injections are necessary for some diabetics.The three main routes are intradermal (ID) , subcutaneous (SC) and intramuscular (IM) . Each type targets a different skin layer: Subcutaneous are administered in the fat layer, underneath the skin. Intramuscular are delivered into the muscle.(often and usually referred to as a “shot” in US English, a “jab” in UK English, or a “jag” in Scottish English and Scots) is the act of administering a liquid, especially a drug, into a person’s body using a needle (usually a hypodermic needle) and a syringe.Different types of injections include intravenous, intramuscular, subcutaneous, intraosseous, and intradermal. A healthcare professional can use , also known as shots, to administer vaccines and other types of medications into a person’s vein, muscle, skin, or bone.way of administering a liquid to a person using a needle and syringe. It’s also sometimes also called a ‘shot’ or ‘jab’. are used to give a wide variety of different medications, such as insulin, vaccines and Botox (onabotulinumtoxinA), but not all injections are the samecome in five main varieties: intravenous, intramuscular, subcutaneous, intraosseous injection, and intradermal. Each of these types is administered differently to suit the individual’s needs for medication delivery.Insert needle at a 90o angle to the skin with a quick thrust. Retain pressure on skin around site with thumb and index finger while needle is inserted. Aspiration is not necessary. Multiple given in the same extremity should be separated as far as possible.